Establishment of the edible and medicinal endemic species Origanum dictamnus on an extensive urban Mediterranean green roof as affected by substrate type and depth

A.N. Martini, M. Papafotiou, K. Evangelopoulos
Considering the beneficial role of green roof technology in urban horticulture, the effect of substrate type and depth on the establishment and initial growth of Origanum dictamnus was investigated. Six-weeks old plantlets were planted at the end of December 2015 in plastic containers with a green roof infrastructure layering (protection mat, drainage layer and filter sheet) and placed on a fully exposed second floor flat roof at the Agricultural University of Athens, Athens Greece. Grape marc compost:perlite:pumice (3:3:4, v/v) and grape marc compost:perlite:pumice:soil (3: 3:2:2, v/v) were used as substrates, in two depths, 7.5 cm (shallow) and 15 cm (deep). Irrigation started in April 2016 and plant growth was evaluated monthly until May 2016. Αll plantlets survived four months after planting. Plant height was higher in plants grown on the soil containing substrate irrespectively of substrate depth, while foliage width and number and length of axillary shoots were greatest in plantlets grown on the deeper substrate containing soil. Conclusively, establishment and initial growth of O. dictamnus plantlets on an extensive urban Mediterranean green roof were affected mainly by substrate type, since soil containing substrate promoted growth compared to the soilless one.
Martini, A.N., Papafotiou, M. and Evangelopoulos, K. (2017). Establishment of the edible and medicinal endemic species Origanum dictamnus on an extensive urban Mediterranean green roof as affected by substrate type and depth. Acta Hortic. 1189, 461-464
DOI: 10.17660/ActaHortic.2017.1189.91
https://doi.org/10.17660/ActaHortic.2017.1189.91
grape marc compost, perlite, pumice, soil, urban horticulture
English

Acta Horticulturae